Rocker side bearing



J. F. OCONNOR.

ROCKER SIDE BEARING. APPLICATION FILED ]AN.20 1919.

1 ,357,799. 7 Patent d Ngv 2, T15320. F491 v I, 4 wmr 1 i I l I w Z 6 31 I: 1 i n I m git!" I g a 1 4 13 f INVIENTOR. WITNESSES: Joni'flmwr BYI ,ATTORN .I. F. O'CONNOR.

ROCKER SIDE BEARING.

APPLICATION FILED lAN;20| 1919.

1,3571799. Pat entedNov. 2,1920.

2 SHEET5-$HEET 2- WITNESSES: J0MF0&W

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JOHN ll. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINER, OF

CHAZY, NEW YORK.

ROCKER SIDE BEARING.

Application filed Januar 'ee, 1919. Serial No.

To all whom it may concern:

Be it known that L Jonn F. OCoNNoR, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Rocker Side Bearings,of which the following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

This invention relates to improvements in rocker side bearings.

One object of the invention is to provide a rocker side hearing moreparticularly adapted for railway cars and which is arranged to besecured to the body bolster, the rocker being freely suspended andadapted to return to central or normal position under the influence ofgravity upon release of the actuating pressure.

Another object of the invention is to provide a rocker bearing of thetype above i11- dicated wherein the rocker is bodily mov able withrespect to its housing and yet so arranged that it cannot be displacedby jarring or vibration from its normal position beyond a predeterminedlimited amount, the permissible limited amount of displacement being sorestricted that the rocker will be in condition to function through anare substantially as great as if in its central normal position.

In the drawings forming a part of this specification, Figure 1 is avertical, sectional view taken transversely through the ends of thetruck and body bolsters of a car and showing my improvements inconnection therewith. Fig. 2 is a horizontal, sectional view takensubstantially on the line 2-2 of Fig. 1. Fig. 3 is a vertical, sectionalview taken substantially on the line .3-3 of Fig. 1. Fig. 4t is a viewsimilar to Fig. l but illustrating a somewhat diiierent embodiment ofthe invention. And Fig. 5 is a vertical, sectional view takensubstantially on the line 5-5 of Fig. l.

In said drawing, 10 denotes the upper section of a truck bolster and 11the lower section of an opposed body bolster and between which myimproved rocker bearing is adapted to be employed. The hearing, asshown, comprises broadly, a housing A, a wear or thrust plate 13, arocker C, a pair of plates D-D and a pair of disks E-E.

The housing A is of substantially hollow Specification of LettersPatent.

Patented Nov. 2 1820.

rectangular formation having end walls 1212 and side walls l313. Thehousing is preferably in the form of a casting open at top and bottomand is provided with suitable lugs lat by which it can be secured to thebody bolster. At the top on its interior, the housing A is provided withledges 15--15 arranged to hold the plate against the body bolster, asclearly shown in Fig. 1. The plate 13 may have a steel insert 16 to takethe direct pressure of the roe :er, as will be understood. The sidewalls 13 of the housing are formed with in wardly extending flanges 17at their lower edges, as clearly indicated in Fig. 3, said flangesforming supporting ledges for the plates D and disks E.

The rocker has an upper curved hearing surface 18 concentric with but ofshorter radius than the lower curved bearing surface 19. The two bearingsurfaces 18 and 19 are joined by flat faces 20 preferably arrangedtangential to the upper bearing sur face 18. At each end, the rocker Uis provided with trunnions 21 arranged concentric with the upper bearingsurface 18. To lessen the amount of metal required for the rocker, thesame may be cored, as indicated at 22 and 23.

Each plate D is of generally triangular formation having a lowerhorizontal edge 24- and inclined edges 2525. There are relatively shortvertical end edges 26-26 and also a horizontal top edge 27. On the faceof each plate D adjacent the rocker, there are provided vertical flanges28-28 spaced apart a distance corresponding to the diameter of thetrunnions of the rocker and the latter are seated within the guidewaysformed by the flanges 28 as apparent from an inspection of Figs. 1 and2.

Each of the disks E is of the same diameter as the trunnions 21 and areequal in thickness substantially to the distance which the trunnionsextended from the body of the rocker G. The disks 'E, as clearly shownin Figs. 1 and 3, are also seated within the guideways formed by theflanges 28 of the plates D and the disks roll upon the flanges 1'? ofthe housing.

The operation is as follows: Assuming the rocker bearing to be broughtinto play when the rocker is in normal position and the body bolsterremaining stationary while the truck bolster moves to the right, asviewed in Fig. 1, it is evident that the rocker will assume the dottedposition shown in Fig. 1. During this movement, it is evident that thecommon center of the bearing surfaces 18 and 19 and of the trunnions 21will move horizontally a comparatively short distance. This movement ofthe rocker will force the plates D toward the right hand end of thehousing A until the plates D assume the dotted position also shown inFig. 1. The disks E will naturally travel with the plates D. In thisconnection, it may be added that the end walls of the housing A arepreferably provided with inwardly projecting shoulders 3030 formed ontheir under sides to correspond with the rocker and limit the upwardmovem nt thereof. If new the pressure on the rocker bearing is relieved,

the rocker will naturally tend to swing back to a state of equilibriumand the weight thereof will be t 'ansferred through the trun- 'nions 21onto the disks E, and as the trunnions are rotated by the swingingmovement the rotative movement will be communicated to the disks E andthe latter will roll along the supporting flanges 17, thus bringing theplates D, rocker and disks E back to their original position since thediameters of the disks E and trunnions 21 are equal. As will beunderstood from the preceding description when considered in connectionwith Figs. 1 and 3, the rocker is normally slightly separated from theupper bearing plate so as to permit the return movement above described.

By referring to Fig. 1, it will be noted that there is a relativelysmall space between the vertical edges 26 of the plates D and the endwalls ofthe housing A. Because of this, it is impossible for the platesD to be shifted from normal position by jarring or vibra tion more thanthe space between a vertical edge 26 and adjacent end wall. Even thoughthis amount of displacement should occur from vibration and while therocker is not being actuated, nevertheless if .the rocker is broughtinto play when the plates D are displaced to their maximum, the rockerswill still have a permissible swinging movement only slightly less thanthe permissible movement from the central normal position of the rocker.With this arrangement, it is impossible to displace the rocker to anamount where it will not properly function.

i In the construction shown in Figs. 4r and the arrangement of housingA, plate l3 androcker Z1 is the same as in Figs. 1, 2 and 3. Instead ofemployingthe plates D, however, Inlay employ two elongated bars :D Dhaving studs 31 on which are rotatranslating oscillating .witn alongitudinally extending day of Jan; 1919.

tably mounted two disks E, the latter being of the same diameter as thestuds on the rocker. In this construction, as in the construction firstdescribed, the bars D are limitedin the amount of possible displacementso that the rocker will always function. When the rocker has beenactuated to the position indicated by dotted lines inl ig. i, it isevident that the return swinging movement of the rocker will becommunicated to all four disks E and the latter together with the bars Dreturned to their original position as in the case of the plates D.

I claim: V a

1. In a rocker side bearing, the combination with a housing adapted tobe secured to a body bolster, of a rocker within said housinghaving'upper and lower concentric bearing surfaces of different radii,trunnions formed on the ends of said rocker concentric with the upperbearing surfaces thereof, members within said housing and supported bythe latter, said members being movable lengthwise of the housing, andmeans for iovement of said rocker to lineal movement of said members,said means including rotatable disks cooperable with the trunnions ofthe rocker.

2. In an anti-frictiori bearing of the character described, thecombination witha hoi low housing having depending side walls each ofwhich is provided at its lower edge ledge; of members lineally slidableback and forth on said ledges, said members being provided on theirinner faces with guiding grooves;

tending within and cooperating with said grooves; and rolling supportingelements for said trunnions sustained on said ledges. 3. In ananti-friction bearing of the character described, the combination with ahollow substantially rectangular housing adapted to be'secured to theunder side of a body bolster or the like, the sidewalls of said housingbeing provided at their loweredges with horizontally extendingledges; ofa member lineally slidably mounted on each of said ledges, each of saidmembers having a vertically extending groove therein onits inner face; adisk supported on each-ledge and disposed within one of said grooves;and a rocker having trunnions at the top thereof at each end, saidtrunnions extending within said grooves and supports-don said disks. I p

In witness thatl claim theforegoing I have hereunto subscribed'my' namethis 2nd JOHN F. OCONNOR.

